Elizabeth Berkley Gives Birth to Son Sky Cole!

Elizabeth Berkley sighting on March 5, 2012 in Los Angeles, California. Berkley announced her pregnancy, saying, "In life there are moments you cherish forever and this is one of them. We are so excited to share this moment and special news! The baby is due this summer."Credit: Jeff Vespa/WireImage.com

She better stock up on those caffeine pills!

Elizabeth Berkley -- aka Bayside High's overcommitted activist Jessie Spano -- became a mom July 20, Us Weekly has learned. "I am moved to share the birth of our new baby boy, Sky Cole Lauren," she tweeted. "Thank you for your beautiful wishes and blessings. We are grateful!"

This is the first child for Berkley amd husband Greg Lauren; they have been married since November 2003.

Berkley isn't the only Saved By the Bell alum to have become a parent since the show went off the air in the early '90s; Mark-Paul Gosselaar (Zack Morris), Tiffani Thiessen (Kelly Kapowski), Lark Voorhies (Lisa Turtle) and Mario Lopez (A.C. Slater) have all started families of their own within the last decade.